Question

The later (second) formed primary xylem elements are called _____________.
A) Protoxylem B) Metaxylem C) Xylem parenchyma D) Xylem fibres

Answer 1

The later(second) formed primary xylem elements are called Protoxylem. Hope this helps!!

Answer 2

Explanation:

⬤•━━━━━━━━━━⬤•━━━━━━━━━━⬤•━━━━━━━━━━⬤•━━━━━━━━━━⬤•━━━━━━━━━━Given: d=3

We know:

an=a+(n−1)d

∴a20−a15=[a+19d]−[a+14d]

                     =5d

                     =5×3

                     =15

Hence, the answer is 15.

Given: d=3

We know:

an=a+(n−1)d

∴a20−a15=[a+19d]−[a+14d]

                     =5d

                     =5×3

                     =15

Hence, the answer is 15.

Given: d=3

We know:

an=a+(n−1)d

∴a20−a15=[a+19d]−[a+14d]

                     =5d

                     =5×3

                     =15

Hence, the answer is 15.

Given: d=3

We know:

an=a+(n−1)d

∴a20−a15=[a+19d]−[a+14d]

                     =5d

                     =5×3

                     =15

Hence, the answer is 15.